using a 5V/1A recom over a 780X for simplicity and efficiency. have used this circuit in the past with good results for alternative uses but thought it would work well for this project with the recom:

i understand the V listed on the circuit is a bit off, but that is just for reference at this point. also will probably change the 1n4004 to a 1n4148, other than that, please lmk your thoughts taking into the following conditions:

i have noticed that the recom datasheets do not recommend any caps at all but i am assuming they are expecting a relatively stable V, my input power will be bouncing all over the place between 9.5V-12.6V constantly and don't know how that will effect the recom vs a regular 780X and if caps should be around the recom due to that fluctuating incoming V.

this will be going on a radio controlled multirotor distribution board that powers an arduino, rx for the radio gear, video tx (1.2 (not yet, in the future) and/or 5.8GHz, 20mW for now, up to 500mW later) and 5V camera. on a side question, should i put some caps before the pins for the vtx/camera also or since the V @ 5V will be regulated, is it a non issue? either way, it is not an issue so please let me know the best way with what i have described. i would like to keep everything running off the main lipo and not run multiple batts, that is very important.

i will tap off this 5V output and use a 3V3 (ti tps71733) ldo reg to power the sensor board which consists of a 3axis gyro, 3axis accel (and possibly 3axis mag and barometer in the future).

here is the ds for the recom, going with the 5V unit:
http://www.recom-international.com/pdf/Innoline/R-78xx-1.0.pdf

thanks in advance for your time and advice,
bob

 

anybody have any input on this?

 

The out put cap is too high, it should be around 10uf

 

The out put cap is too high, it should be around 10uf

thanks, anybody else?

 

any other input? i would like to get as much feedback as possible before i have the proto boards made.

 

I guess tht's it.
Those values are what I always use.

 

thanks

since i am going to break out some pins that will also power a 5V video tx and camera, should i put a 100nF ceramic before the pins for that output to get it as clean as possible? i think i need to hit up craigslist for an older o-scope to see exactly what i am getting w/ the noise in the power lines, but until then, would the 100nF ceramics be ok to power a video setup or should i use a different value? and should it be ceramic, tantalum or electrolytic?

any links would be welcome as i don't have a problem learning on my own, just the google lottery sometimes returns not-so-helpful results.

thanks again.